PHP会员找回密码功能的简单实现

文章来自：博客

http://www.jb51.net/article/91944.htm

设置思路

1、用户注册时需要提供一个E-MAIL邮箱，目的就是用该邮箱找回密码。

2、当用户忘记密码或用户名时，点击登录页面的“找回密码”超链接，打开表单，并输入注册用的E-MAIL邮箱，提交。

3、系统通过该邮箱，从数据库中查找到该用户信息，并更新该用户的密码为一个临时密码（比如：12345678）。

4、系统借助Jmail功能把该用户的信息发送到该用户的邮箱中（内容包括：用户名、临时密码、提醒用户及时修改临时密码的提示语）。

5、用户用临时密码即可登录。

HTML

我们在找回密码的页面上放置一个要求用户输入注册时所用的邮箱，然后提交前台js来处理交互。

代码如下

<p><strong>输入您注册的电子邮箱，找回密码：</strong></p> 
<p><input type="text" class="input" name="email" id="email"><span id="chkmsg"></span></p> 
<p><input type="button" class="btn" id="sub_btn" value="提 交"></p>

jQuery

当用户输入完邮箱并点击提交后，jQuery先验证邮箱格式是否正确，如果正确则通过向后台sendmail.php发送Ajax请求，sendmail.php负责验证邮箱是否存在和发送邮件，并会返回相应的处理结果给前台页面，请看jQuery代码：

代码如下

$(function(){ 
$("#sub_btn").click(function(){ 
var email = $("#email").val(); 
var preg = /^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*/; //匹配Email 
if(email=='' || !preg.test(email)){ 
$("#chkmsg").html("请填写正确的邮箱！"); 
}else{ 
$("#sub_btn").attr("disabled","disabled").val('提交中..').css("cursor","default"); 
$.post("sendmail.php",{mail:email},function(msg){ 
if(msg=="noreg"){ 
$("#chkmsg").html("该邮箱尚未注册！"); 
$("#sub_btn").removeAttr("disabled").val('提 交').css("cursor","pointer"); 
}else{ 
$(".demo").html("<h3>"+msg+"</h3>"); 
} 
}); 
} 
}); 
})

以上使用的jQuery代码很方便简洁的完成了前端交互操作，如果您有一定的jQuery基础，那上面的代码一目了然，不多解释。

当然别忘了在页面中加载jQuery库文件，有的同学经常问我说从网上下载了demo怎么用不了，那80%是jquery或者其他文件加载路径错了导致没加载必要的文件。

PHP

sendmail.php需要验证Email是否存在系统用户表中，如果有，则读取用户信息，将用户id、用户名和密码惊醒md5加密生成一个特别的字符串作为找回密码的验证码，然后构造URL。同时我们为了控制URL链接的时效性，将记录用户提交找回密码动作的操作时间，最后调用邮件发送类发送邮件到用户邮箱

代码如下

include_once("connect.php");//连接数据库 
 
$email = stripslashes(trim($_POST['mail'])); 
 
$sql = "select id,username,password from `t_user` where `email`='$email'"; 
$query = mysql_query($sql); 
$num = mysql_num_rows($query); 
if($num==0){//该邮箱尚未注册！ 
echo 'noreg'; 
exit; 
}else{ 
$row = mysql_fetch_array($query); 
$getpasstime = time(); 
$uid = $row['id']; 
$token = md5($uid.$row['username'].$row['password']);//组合验证码 
$url = "/demo/resetpass/reset.php?email=".$email." 
&token=".$token;//构造URL 
$time = date('Y-m-d H:i'); 
$result = sendmail($time,$email,$url); 
if($result==1){//邮件发送成功 
$msg = '系统已向您的邮箱发送了一封邮件<br/>请登录到您的邮箱及时重置您的密码！'; 
//更新数据发送时间 
mysql_query("update `t_user` set `getpasstime`='$getpasstime' where id='$uid '"); 
}else{ 
$msg = $result; 
} 
echo $msg; 
} 
 
//发送邮件 
function sendmail($time,$email,$url){ 
include_once("smtp.class.php"); 
$smtpserver = ""; //SMTP服务器，如smtp.163.com 
$smtpserverport = 25; //SMTP服务器端口 
$smtpusermail = ""; //SMTP服务器的用户邮箱 
$smtpuser = ""; //SMTP服务器的用户帐号 
$smtppass = ""; //SMTP服务器的用户密码 
$smtp = new Smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass); 
//这里面的一个true是表示使用身份验证,否则不使用身份验证. 
$emailtype = "HTML"; //信件类型，文本:text；网页：HTML 
$smtpemailto = $email; 
$smtpemailfrom = $smtpusermail; 
$emailsubject = "www.jb51.net - 找回密码"; 
$emailbody = "亲爱的".$email."：<br/>您在".$time."提交了找回密码请求。请点击下面的链接重置密码 
（按钮24小时内有效）。<br/><a href='".$url."'target='_blank'>".$url."</a>"; 
$rs = $smtp->sendmail($smtpemailto, $smtpemailfrom, $emailsubject, $emailbody, $emailtype); 
 
return $rs; 
}

好了，这个时候你的邮箱将会收到一封来自helloweba的密码找回邮件，邮件内容中有一个URL链接，点击该链接到reset.php来验证邮箱。

 

代码如下

include_once("connect.php");//连接数据库 
 
$token = stripslashes(trim($_GET['token'])); 
$email = stripslashes(trim($_GET['email'])); 
$sql = "select * from `t_user` where email='$email'"; 
 
$query = mysql_query($sql); 
$row = mysql_fetch_array($query); 
if($row){ 
$mt = md5($row['id'].$row['username'].$row['password']); 
if($mt==$token){ 
if(time()-$row['getpasstime']>24*60*60){ 
$msg = '该链接已过期！'; 
}else{ 
//重置密码... 
$msg = '请重新设置密码，显示重置密码表单，<br/>这里只是演示，略过。'; 
} 
}else{ 
$msg = '无效的链接'; 
} 
}else{ 
$msg = '错误的链接！'; 
} 
echo $msg;

 reset.php首先接受参数email和token，然后根据email查询数据表t_user中是否存在该Email，如果存在则获取该用户的信息，并且和sendmail.php中的token组合方式一样构建token值，然后与url传过来的token进行对比，如果当前时间与发送邮件时的时间相差超过24小时的，则提示“该链接已过期！”，反之，则说明链接有效，并且调转到重置密码页面，最后就是用户自己设置新密码了。

小结：通过注册邮箱验证与本文邮件找回密码，我们知道发送邮件在网站开发中的应用以及它的重要性，当然，现在也流行短信验证应用，这个需要相关的短信接口对接就可以了。

最后，附上数据表t_user结构：

代码如下

CREATE TABLE `t_user` ( 
`id` int(11) NOT NULL auto_increment, 
`username` varchar(30) NOT NULL, 
`password` varchar(32) NOT NULL, 
`email` varchar(50) NOT NULL, 
`getpasstime` int(10) NOT NULL, 
PRIMARY KEY (`id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

smtp.class.php类文件

代码如下

<?php
 
class Smtp{
 
/* Public Variables */
 
var $smtp_port;
 
var $time_out;
 
var $host_name;
 
var $log_file;
 
var $relay_host;
 
var $debug;
 
var $auth;
 
var $user;
 
var $pass;
 
/* Private Variables */
var $sock;
 
/* Constractor */
 
function smtp($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass) {
$this->debug = false;
 
$this->smtp_port = $smtp_port;
 
$this->relay_host = $relay_host;
 
$this->time_out = 30; //is used in fsockopen()
 
$this->auth = $auth; //auth
 
$this->user = $user;
 
$this->pass = $pass;
 
$this->host_name = "localhost"; //is used in HELO command
$this->log_file = "";
 
$this->sock = false;
}
 
/* Main Function */
 
function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "") {
$mail_from = $this->get_address($this->strip_comment($from));
 
$body = ereg_replace("(^|(rn))(.)", "1.3", $body);
 
$header .= "MIME-Version:1.0rn";
 
if ($mailtype == "HTML") {
$header .= "Content-Type:text/htmlrn";
}
 
$header .= "To: " . $to . "rn";
 
if ($cc != "") {
$header .= "Cc: " . $cc . "rn";
}
 
$header .= "From(www.jb51.net): $from<" . $from . ">rn";
 
$header .= "Subject: " . $subject . "rn";
 
$header .= $additional_headers;
 
$header .= "Date: " . date("r") . "rn";
 
$header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")rn";
 
list ($msec, $sec) = explode(" ", microtime());
 
$header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . ">rn";
 
$TO = explode(",", $this->strip_comment($to));
 
if ($cc != "") {
$TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
}
 
if ($bcc != "") {
$TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
}
 
$sent = true;
 
foreach ($TO as $rcpt_to) {
$rcpt_to = $this->get_address($rcpt_to);
 
if (!$this->smtp_sockopen($rcpt_to)) {
$this->log_write("Error: Cannot send email to " . $rcpt_to . "n");
 
$sent = false;
 
continue;
}
 
if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
$this->log_write("E-mail has been sent to <" . $rcpt_to . ">n");
} else {
$this->log_write("Error: Cannot send email to <" . $rcpt_to . ">n");
 
$sent = false;
}
 
fclose($this->sock);
 
$this->log_write("Disconnected from remote hostn");
}
 
return $sent;
}
 
/* Private Functions */
 
function smtp_send($helo, $from, $to, $header, $body = "") {
if (!$this->smtp_putcmd("HELO", $helo)) {
return $this->smtp_error("sending HELO command");
}
// auth
if ($this->auth) {
if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {
return $this->smtp_error("sending HELO command");
}
 
if (!$this->smtp_putcmd("", base64_encode($this->pass))) {
return $this->smtp_error("sending HELO command");
}
}
 
if (!$this->smtp_putcmd("MAIL", "FROM:<" . $from . ">")) {
return $this->smtp_error("sending MAIL FROM command");
}
 
if (!$this->smtp_putcmd("RCPT", "TO:<" . $to . ">")) {
return $this->smtp_error("sending RCPT TO command");
}
 
if (!$this->smtp_putcmd("DATA")) {
return $this->smtp_error("sending DATA command");
}
 
if (!$this->smtp_message($header, $body)) {
return $this->smtp_error("sending message");
}
 
if (!$this->smtp_eom()) {
return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
}
 
if (!$this->smtp_putcmd("QUIT")) {
return $this->smtp_error("sending QUIT command");
}
 
return true;
}
 
function smtp_sockopen($address) {
if ($this->relay_host == "") {
return $this->smtp_sockopen_mx($address);
} else {
return $this->smtp_sockopen_relay();
}
}
 
function smtp_sockopen_relay() {
$this->log_write("Trying to " . $this->relay_host . ":" . $this->smtp_port . "n");
 
$this->sock = @ fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
 
if (!($this->sock && $this->smtp_ok())) {
$this->log_write("Error: Cannot connenct to relay host " . $this->relay_host . "n");
 
$this->log_write("Error: " . $errstr . " (" . $errno . ")n");
 
return false;
}
 
$this->log_write("Connected to relay host " . $this->relay_host . "n");
 
return true;
;
}
 
function smtp_sockopen_mx($address) {
$domain = ereg_replace("^.+@([^@]+)$", "1", $address);
 
if (!@ getmxrr($domain, $MXHOSTS)) {
$this->log_write("Error: Cannot resolve MX "" . $domain . ""n");
 
return false;
}
 
foreach ($MXHOSTS as $host) {
$this->log_write("Trying to " . $host . ":" . $this->smtp_port . "n");
 
$this->sock = @ fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
 
if (!($this->sock && $this->smtp_ok())) {
$this->log_write("Warning: Cannot connect to mx host " . $host . "n");
 
$this->log_write("Error: " . $errstr . " (" . $errno . ")n");
 
continue;
}
 
$this->log_write("Connected to mx host " . $host . "n");
 
return true;
}
 
$this->log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")n");
 
return false;
}
 
function smtp_message($header, $body) {
fputs($this->sock, $header . "rn" . $body);
 
$this->smtp_debug("> " . str_replace("rn", "n" . "> ", $header . "n> " . $body . "n> "));
 
return true;
}
 
function smtp_eom() {
fputs($this->sock, "rn.rn");
 
$this->smtp_debug(". [EOM]n");
 
return $this->smtp_ok();
}
 
function smtp_ok() {
$response = str_replace("rn", "", fgets($this->sock, 512));
 
$this->smtp_debug($response . "n");
 
if (!ereg("^[23]", $response)) {
fputs($this->sock, "QUITrn");
 
fgets($this->sock, 512);
 
$this->log_write("Error: Remote host returned "" . $response . ""n");
 
return false;
}
 
return true;
}
 
function smtp_putcmd($cmd, $arg = "") {
if ($arg != "") {
if ($cmd == "")
$cmd = $arg;
 
else
$cmd = $cmd . " " . $arg;
}
 
fputs($this->sock, $cmd . "rn");
 
$this->smtp_debug("> " . $cmd . "n");
 
return $this->smtp_ok();
}
 
function smtp_error($string) {
$this->log_write("Error: Error occurred while " . $string . ".n");
 
return false;
}
 
function log_write($message) {
$this->smtp_debug($message);
 
if ($this->log_file == "") {
return true;
}
 
$message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message;
 
if (!@ file_exists($this->log_file) || !($fp = @ fopen($this->log_file, "a"))) {
$this->smtp_debug("Warning: Cannot open log file "" . $this->log_file . ""n");
 
return false;
;
}
 
flock($fp, LOCK_EX);
 
fputs($fp, $message);
 
fclose($fp);
 
return true;
}
 
function strip_comment($address) {
$comment = "([^()]*)";
 
while (ereg($comment, $address)) {
$address = ereg_replace($comment, "", $address);
}
 
return $address;
}
 
function get_address($address) {
$address = ereg_replace("([ trn])+", "", $address);
 
$address = ereg_replace("^.*<(.+)>.*$", "1", $address);
 
return $address;
}
 
function smtp_debug($message) {
if ($this->debug) {
echo $message . "
;";
}
}
}
?>

以上这篇PHP会员找回密码功能的简单实现就是小编分享给大家的全部内容了，希望能给大家一个参考